Exhaust fan



P 27," 1954 s. M. BERNSTEIN 2,676,530

EXHAUST FAN Filed Dec. 1a, 1947 2 Sheets-Sheet 1 flI/lllll 17/5. Bel/145724192,

axial/ml,

s. M. BERNSTEIN EXHAUST FAN Apr-i127, 1954 2 Sheets-Sheet 2 Filed Dec.18, 1947 Patented Apr. 27, 1954 UNITED STATES PATENT OFFICE EXHAUST FANSamuel M. Bernstein, Chicago, Ill. Application December 18, 1947, SerialNo. 792,562

1 Claim. 1

The invention relates to exhaust fans and more particularly to fansprovided with a shutter.

In installing exhaust fans with shutters according to standard practicea double installation is necessary by first securing the blower inproper position and subsequently attaching the shutter.

According to my invention it is an object to provide an exhaust fan towhich the shutter is already secured so that a simplified andexpeditious method of installing the unit is afforded.

It is a further object to provide the frame of the fan with means forreadily attaching the shutter to the frame so as to provide an operableunit.

It is also an object to provide certain features of construction andarrangement of parts tending to enhance the utility and efficiency of adevice of the character specified.

With these and other objects in view which will become apparent from adisclosure of the invention, the latter comprises the means described inthe following specification, particularly pointed out in the claimforming a part thereof, and illustrated in the accompanying drawings, inwhich Fig. 1 is the front view of an exhaust fan constructed inaccordance with my invention,

Fig. 2 is a rear view thereof.

Fig. 3 is an enlarged section on the line 3-3 of Fig. 1.

Fig. 4 is an isometric view of the frame, only.

Fig. 5 is an enlarged section on the line '.i5 of Fig. 3. 4

Fig. 6 is a fragmentary isometric view of a corner of the frame.

Referring to the several views of the drawing [0 designates a wall inwhich an opening H is provided with a wooden frame l2.

A front plate I3 is secured to the wooden frame by screws M and isprovided with a large circular opening l5, the edge of which is bentinwardly to form a circular flange I6.

To the front plate [3 is secured as at IT a horizontal arm l8 which isbent upwardly to form a support [9 for a platform 20.

Bracket arms 2! and 22 leading from the platform to the front platefurther maintain the platform in functional position.

A motor 23 having a base 24 is secured by bolts 25 to the platform.

The motor shaft 26 carries at its free end a fan 21.

The parts thus far described do not per se form a part of the invention.

To the outer side of the front plate (Fig. 4) is secured a rectangularframe 23 made up of four angle irons 28A one leg 28B of each of which iswelded to the front plate or secured in any other preferred or approvedmanner, so that the angles lie end to end in a rectangular array, whilethe remaining sides or legs of the several angles all project outwardlyto define a square fiange to fit into the opening of the wall l0.

A Z-bar 29 is secured to the upper side 30 of the frame and a verticalchannel member 3| (Fig. 6) is secured to each side member 32 by screws33.

Each channel member is provided with a plurality of vertically spacedopenings 34, and the pivot openings of both channel members are inhorizontal registry.

Pivot rods 35 (Fig. 5) are journaled in appertaining pairs of openings34 of the channel members and have rigidly secured thereto louvers orshutter plates 36 in overlapping relation to form a shutter 3! whichcloses when the fan is not running to shut out back fiow and weather.

A vertical link bar 38 is connected by diagonally and rectangularlyoffset arms 39 to each louver so that the opening and closing movementsof said louvers are synchronized as will be readily understood by thoseversed in the art.

It is evident that the blower and shutter when assembled may be handledas a unit and thus facilitate installation and removal from the wallopening.

The method employed in assembling the blower and shutter eliminateslabor in installing as compared with the present day practice ofindividually installing the blower and subsequently the shutter,

While the drawing shows one embodiment of the invention, numerouschanges and alterations may be made without departing from the spirit ofthe invention.

I, therefore, wish to include all modifications, rearrangements andrevisions constituting departures within the scope of the invention, asdefined in the appended claim.

I claim:

In an exhaust fan structure, a rectangular plate adapted to fit over awall opening and having a round central aperture; a mounting bracket fora motor fan secured on one side of said plate in alignment with saidaperture; a rectangular flange defining a shallow frame on the oppositeside of said plate from said mounting bracket and surrounding saidaperture, said plate and frame flange defining a shallow compartment;and a set of pivoted louvers mounted in said shallow compartment toextend fully across the same, each louver having pintle means atopposite ends thereof, a channel member on the inside of each one of apair of opposite portions of said rectangular flange and respectivelyhaving said pintle means seated therein; together with an annular baffleflange on said plate and surrounding said aperture and projecting intosaid shallow compartment but having its innermost margin terminatedshort of said louvers so as not to obstruct the free pivotal movement ofthe louvers.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,525,649 Ilg Feb. 10, 1925 1,532,635 Osbun Apr. 7, 1925Number Number Name Date Nielsen Jan. 1, 1929 Nuttall June 4, 1929 ScottJune 3, 1930 Frank May 1, 1934 Melin Jan. 19, 1937 Hueglin June 22, 1937Hueglin Apr. 26, 1938 Benson Jan. 7, 1941 Denman June 29, 1943 Bird Aug.8, 1944 Cooper Jan. 4, 1949 Lehman Apr. 29, 1952 FOREIGN PATENTS CountryDate Germany Apr. 21, 1933 France May 20, 1935

